Linux Open Port 80 (HTTP Web Server Port)

by on February 6, 2008 · 20 comments· LAST UPDATED February 18, 2014

in , ,

I am new CentOS/RHEL 5.x/6.x user. How do I open port 80 (Apache Web Server) under Red Hat / CentOS / Fedora Linux?

Tutorial details
DifficultyEasy (rss)
Root privilegesYes
RequirementsNone
Estimated completion time2m
The default configuration file for iptables based firewall on RHEL / CentOS / Fedora Linux is /etc/sysconfig/iptables for IPv4 based firewall. For IPv6 based firewall you need to edit /etc/sysconfig/ip6tablesfile.

Open this file using a text editor such as vi/vim or emacs:

Linux Open Port 80 (http)

# vi /etc/sysconfig/iptables
Append rule as follows rules on RHEL/CentOS version 5.x or older:
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
## Open 443 port i.e. HTTPS
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT

IF you are using RHEL/Centoa version 6.x or above, try:
-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
## Open 443 port i.e. HTTPS
-A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT

Save and close the file. Restart iptables service, enter:
# /etc/init.d/iptables restart

See "CentOS / Redhat Iptables Firewall Configuration Tutorial" for more information.

TwitterFacebookGoogle+PDF versionFound an error/typo on this page? Help us!

{ 20 comments… read them below or add one }

1 gabriel July 18, 2009 at 6:34 pm

I tried this and restarted the ipchains with service iptables restart

but it will still not work.

any ideas?

Reply

2 james stewart July 20, 2009 at 9:10 am

Thanks for this. Being used to debian/ubuntu I’d forgotten where to go when setting up a CentOS box.

@gabriel – you might want to try moving the rule further up in the file. I put it as the last rule but that didn’t work. Moving it further up (in particular before “-A RH-Firewall-1-INPUT -j REJECT –reject-with icmp-host-prohibited”) seemed to do the trick.

Reply

3 Lance Olsen September 10, 2010 at 7:01 pm

This almost worked for me. Using -A was a problem however, because the rule needed to be insterted at the top because of other rules I had in place. If the above doesn’t work for you, use the following at the command line:

iptables -I RH-Firewall-1-INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT

Reply

4 sanjay February 17, 2011 at 6:22 am

Firstly Many thank you to you all…

Awesome…and Great community on earth and heartily thank you again for all your time and expertise.

I have used below and it works…

iptables -I RH-Firewall-1-INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT

Reply

5 milniki za sanitarije October 13, 2010 at 12:58 pm

Thank you for this one, I really needrf this for my Apache config :)

Reply

6 PHP Guru April 27, 2011 at 6:29 am

This is great and worked perfectly! Thank you for posting this. I was wondering if you know the way to do the same thing from the command line (without vi) so that it can be scripted. I found on some other blog

iptables -A INPUT -p tcp --dport 80 -j ACCEPT
service iptables save

but when I tried that it didn’t work and when I checked /etc/sysconfig/iptables there’s no rule for port 80 like I expected.

Reply

7 Soj August 26, 2011 at 3:23 am

I have used the following to open port 80 via iptables:

iptables -A INPUT -p tcp -m state –state NEW,ESTABLISHED -j ACCEPT –dport 80

Reply

8 Amani Musomba February 8, 2012 at 5:48 am

I used the below commands to open port 443 via iptables from the command line.

/sbin/iptables -A INPUT -m state –state NEW -p tcp –dport 443 -j ACCEPT
/etc/init.d/iptables save
/etc/init.d/iptables restart

and it worked for me.

Reply

9 Pizzaroo February 22, 2012 at 10:49 am

thanks a lot buddy

Reply

10 David Kendall March 2, 2012 at 4:08 pm

Thank you. This worked perfectly for me.

Reply

11 Daniel S. March 21, 2012 at 3:10 am

Yeah make sure you don’t put that line at the very bottom. Thanks for the great suggestion!

Reply

12 Herznad April 17, 2012 at 6:52 pm

Hello i connect to my server feddora

1. vi /etc/sysconfig/iptables
2. -A RH-Firewall-1-INPUT -m state –state NEW -m tcp -p tcp –dport 27015 -j ACCEPT
3. how to close them and how to save also i can’t how to back like cd what happening

i dont know give mee a screen please how to save and exit from log beacuse i dont know how to exit i try everything exit he dosent do close ctrl + c nothing only x logout ???

Reply

13 Herznad April 17, 2012 at 6:53 pm

I Want to know step by step every words please

1.2.3.4.5.6 steps please replay sir soon as you can step by step

first user and pass to connect to my root server second what to do 3th 4th etc… i want to know :S:S:S

Reply

14 rafael July 13, 2012 at 8:09 am

Thank you!
Don’t forget to save the rules!
# service iptables save

Reply

15 John RK July 18, 2012 at 8:33 am

The following is working fine…execute all 6 command line scripts.
ENV: Red Hat Enterprise Linux Server release 5.3 (Tikanga)
Opening ports 80 & 443
=====================================
1. iptables -A INPUT -p tcp –dport 80 -j ACCEPT
2. iptables -A INPUT -p tcp –dport 443 -j ACCEPT
3. service iptables save
4. /etc/init.d/iptables restart
5. service ip6tables stop
6. chkconfig ip6tables off

Reply

16 WallTearer September 14, 2012 at 1:02 pm

Thanks a lot!
The following worked for me:
add line:
-A INPUT -p tcp -m tcp –dport 80 -j ACCEPT
in the file:
/etc/sysconfig/iptables
and then restart iptables by:
/etc/init.d/iptables restart

Reply

17 srihari October 31, 2012 at 3:21 am

thank you all. it helped me.

Reply

18 Shamsul Haque February 19, 2013 at 5:27 pm

Thanks a lot buddy. Its really a nice post.

Reply

19 Jared Chiddix February 15, 2014 at 11:49 am

1. iptables -A INPUT -p tcp –dport 80 -j ACCEPT
2. iptables -A INPUT -p tcp –dport 443 -j ACCEPT
3. service iptables save
4. /etc/init.d/iptables restart
5. service ip6tables stop
6. chkconfig ip6tables off

Reply

20 dxman February 18, 2014 at 6:19 am

m one Hundred Ten % Sure that this website will make me complete System Administrator

Reply

Leave a Comment

Tagged as: , , , , , , , ,

Previous Faq:

Next Faq: